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 Post subject: Sigma 18-250
PostPosted: Mon May 17, 2010 9:22 pm 
I'm considering trading in my 3 Canon lenses: 18-55, 28-90 and 75-300 IS for a SIGMA 18-250. I use these with a Canon 20D. Any advice from anyone?

Also, in looking at various web sites, I see the SIGMA listed as DC OS HSM IF. I need help deciphering what these mean. OS = optically stabilized, I think; like Canon IS. But the others?

Thanks for your help.


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 Post subject:
PostPosted: Mon May 17, 2010 9:47 pm 
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Joined: Fri Sep 05, 2008 4:42 pm
Posts: 1388
Location: The Netherlands
DC = lens is created for cropped sensor bodies use only (like the 20D)
HSM = like Canon's USM, high speed AF motor
OS = IS on Canon indeed
IF = Internal Focussing, when focussing the lens stays the same length and the front element doesn't turn (handy for using special effect filters)

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- Wout -
Lowepro Nova 200 AW filled with Nikon D90 + MB-D80
18-70 DX, 70-300 VR, 35 1.8 DX, SB-700


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